A canister unlike a skimmer traps waste and keeps it in the water which elevates your no3
and needs to be cleaned often (1-2 times a week).
Skimmers remove the waste into a collection cup away from the water and reduces your no3
What has changed since you last said the problem was fixed
Are you getting wet or dry foam from your SUPER 1002 VORTEX PROTEIN SKIMMER
As Ziggy mentioned baffles are the easiest way to control excess bubbles from entering the tank.
There are a couple of ways to implement the baffles into your 15 gal
fuge. The standard silicon
or the presure lock
are two options.